光圈(计算机存储器)
半最大全宽
材料科学
传感器
相控阵
光学
焦距
模块化设计
压电
声学
天线(收音机)
光电子学
电气工程
计算机科学
工程类
物理
复合材料
镜头(地质)
操作系统
作者
Greyson E Stocker,Jonathan E Lundt,Jonathan R Sukovich,Ryan M Miller,Alexander P Duryea,Timothy L Hall,Zhen Xu
出处
期刊:IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control
[Institute of Electrical and Electronics Engineers]
日期:2022-05-26
卷期号:69 (10): 2766-2775
被引量:2
标识
DOI:10.1109/tuffc.2022.3178291
摘要
A novel method for fabricating a modular, kerf-minimizing histotripsy phased array was developed and tested. The method utilizes arbitrarily shaped elements, 3-D printing, water jet cutting, and a thin, 125- [Formula: see text] electrically insulating epoxy coating to maximize aperture utilization while allowing for replacement of individual transducer modules. The method was used to fabricate a 750-kHz truncated circular aperture array (165 mm ×234 mm) transducer with a focal length of 142 mm. The aperture was segmented into 260 arc-shaped modular elements, each approximately 11.5 mm ×11.5 mm, arranged in concentric rings. The resulting aperture utilization was 92%. The full-width-half-maximum (FWHM) focal zone of the array was measured to be 1.6 mm ×1.1 mm ×4.5 mm, and the FWHM electrical steering range was measured to be 38.5 mm ×33 mm 40 mm. The array was estimated to be capable of generating approximately 120-MPa peak negative pressure at the geometric focus. In addition, the array was used to ablate a 5-cm3 volume of tissue with electric focal steering.
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